【hadoop学习】--（2）安装和配置hadoop伪分布式

先上一张成功的截图

下面是安装和配置的过程

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接上文

【hadoop学习】--（1）hadoop安装前准备

9 安装hadoop

<1>安装
tar -zvxf hadoop-1.1.2.tar.gz 
mv hadoop-1.1.2 /usr/lib/hadoop
<2>环境变量
执行gedit /etc/profile添加和修改后为：
export JAVA_HOME=/usr/lib/jvm
export HADOOP_HOME=/usr/lib/hadoop/
export PATH=.:$JAVA_HOME/bin:$HADOOP_HOME/bin:$PATH
source /etc/profile
10 配置hadoop伪分布式
<1>/usr/lib/hadoop/conf# gedit hadoop-env.sh 
第9行改为：
export JAVA_HOME=/usr/lib/jvm
<2>/usr/lib/hadoop/conf# gedit core-site.xml 
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://hadoop:9000</value>
<description>hadoop</description>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>/usr/lib/hadoop/temp</value>
</property>
</configuration>
<3>/usr/lib/hadoop/conf# gedit hdfs-site.xml
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.permissions</name>
<value>false</value>
</property>
</configuration>
<4>/usr/lib/hadoop/conf# gedit mapred-site.xml 
<configuration>
<property>
<name>mapred.job.tracker</name>
<value>hadoop:9001</value>
</property>
</configuration>
<5>格式化hdfs
执行：hadoop namenode -format
<6>启动hadoop
/usr/lib# start-all.sh输出下面的消息：
Warning: $HADOOP_HOME is deprecated.


starting namenode, logging to /usr/lib/hadoop/libexec/../logs/hadoop-root-namenode-hadoop.out
localhost: starting datanode, logging to /usr/lib/hadoop/libexec/../logs/hadoop-root-datanode-hadoop.out
localhost: starting secondarynamenode, logging to /usr/lib/hadoop/libexec/../logs/hadoop-root-secondarynamenode-hadoop.out
starting jobtracker, logging to /usr/lib/hadoop/libexec/../logs/hadoop-root-jobtracker-hadoop.out
localhost: starting tasktracker, logging to /usr/lib/hadoop/libexec/../logs/hadoop-root-tasktracker-hadoop.out
<7>测试的url
http://localhost:50030/     -Hadoop 管理介面
http://localhost:50060/     -Hadoop Task Tracker 状态
http://localhost:50070/     -Hadoop DFS 状态
  测试进程
jps有除jps外有5个进程
<8>支持windows下面浏览器测试
修改C:\Windows\System32\drivers\etc\hosts文件，增加

192.168.80.100 hadoop

注：如果jps进程数不足5个代表安装配置失败

请检查配置文件有没有敲错了

确认正确了->执行stop-all.sh->删除temp文件夹->重新格式化一下